Method of making paper boxes



L. C. PALMER METHOD OF MAKING PAPER BOXES File'd June'ii, 1919 Nov. 201923.

Patented nee e, was.

- tartan arnr rice.

LYHDQN C. EALMEB, OF BUEF, NEW YOK, EGHOE Ti} F. H. BURT CGMPANY,

LIMITED, 05 TQRONTO; ONTARIO, CANADA, A CQREGBATIOH 0F QN'EAEJEQ,

METHOD OE HANG PAPER 330m.

Application filed June a,

To all whom it may concern:

Be it known that l ,LYNDON C. PALMER, a citizen of the Uni States,residing at Bufi'alo', in the county of Erie and State of New York, haveinvented certain new and useful Improvements in Methods of Making PaperBoxes, of which the following is a full, clear, and exact description,such as will enable others skilled in the artto which it appertains tomake and use the same.

This invention relates to boxes and methods-of making boxes, and withrespect to its more specific features, to methods of making paper boxesand parts thereof.

. One of the objects of the invention is the provision of a practicalmethod for expeditiously making crimped edge boxes and parts thereof. a

Another object of the invention is the provision of an efficient methodfor the manufacture of the bodies of boxes, especially bodies involvingcrimped edges for securing the heads or bottoms in place.

Another object of the invention is the provision of a practical methodfor makin crimps in box parts of the character referred to.

Other objects will be in part obvious and in part pointed outhereinafter.

The invention accordingly consists in the features of construction,combinations of elements and arrangement of parts which will beexemplified in the construction hereinafter set forth, and the scope ofthe application of which will be indicated in the following claims.

In the accompanying drawings forming part of this specification, whereinsimilar reference characters refer to similar parts throughout theseveral views- Figures 1 and 2 are views of strips of material which maybe employed in practicing the method; I I

Fig. .3 is a sectional view of a coiled or gounl strip made of thematerial shown' in Fig. 4 is a sectional view of the coiled or woundstrip of Fig. 3 associated'with'a. coiled or wound strip made of thematerial il lustrated in Fig. 1, and showing a succeeding stepof themethod;

Fig. 5 is a plan view of the associated coiled strips illustrated inFig. 4;

Fig. 6 is a. sectional view of Fig. 4, illus- 1919. Serial E0. 801,513.

trating a head in position to be secured in place;

Fig. l is a view similar to Fig. 6, showing the head held in place bythe crimped edge of the outer wound strip; and

8 is a sectional view through one embodnnent of a completed box.

Referring now more s ecifically to the drawings, the numeral l( ig; 2)indicates a strip of material which is to be wound or coiled into aring, as, for instance, the ring shown in Fig. 3, the opposite ends ofthe strip being circumferentially overlapped, these ends appearing in Fi3 at 2 and 3. The numeral a (Fig. 1) in 'cates a strip of material whichis to be wound into a ring and its ends overlapped as shown, forinstance, in Fig. l, where the overlapping ends are indicated by-thenumerals 5 and 6. The two strips of material are of difierent widths,the strip 1 being designed to form the inner body portion, or ring, ofthe box part to be made and the strip l being designed to form the outerbody portion, or ring, of such part. In practice, the narrower strip 1is first coated on the outside with adhesive material and wound into aring with overlap in ends, one or more plies being formed t e adhesiveserving to secure the plies together. Then the strip 4:, previouslcoated on the inside with adhesive, as g ue, is wound upon the ring 1,one or more plies being formed, and the plies being secured together bythe adhesive employed. By making the width of the strip 1 equal to thedepth of the flange, or body, of the box part on the inside, and bymaking the strip 4 of greater width, the two stri s may be associatedandwound one upon t e other into rings as illustrated in Fig. 4, in whichone edge of each rin as for instance the edges 7 and 8, will he ush withthat of the other, in consequence of which the opposite. edge 9 of theinner ring will intercept the width of the outer ring and form a.

' shoulder intermediate the width of the outer ring, whereby a portion10 of the wall ofthe outer r will project above such shoal: der. Therewill thus be formed a box body comprising two rings, one surrounding theother and one adhering to the other, and in each ring the opposite endsof the comipos ing strip will be overlapped so. as to avoid buttjibilllli i .termore, the thicess of Mil) ' also afforded opportunityfor using thick or thin material as may be desired, the use of thickmaterial requiring 'a less number of plies than the use of thm material,and the use of thin material enabling a strong box part to be made whichotherwise, when in single ply, would have no substantial resistance tocrushing and would have to be braced in some manner. Having formed andassociated the two rings as illustrated in Fig. 4:, a head 11 is placedwithin the projecting edge of the outer ring so as to rest upon theshoulder formed by the upper edge of the inner ring, as shown in Fig. 6,and thereupon the projecting edge portion 10 of the outer ring is curledor crimped inwardly onto said head, as illustrated at 12, so as toretain the head in position. It is to be understood that box parts madein accordance with the method may be utilized either as the bases orcovers of boxes, and in Fig. 8 is illustrated both a base and a coverassociated in operative relation.

It is to be observed that by sizin the strip 4, as by gluing it on oneface so as to provide a glued inner face of that portion 10 of the outerring-which projects above the proximate edge, or shoulder 9, such gluedprojecting portion of this ring becomes so modified as to be readilyadapted for crimping and maintaining crimped condition. The crimping maybe effected between dies, one of which will support the box part at oneside and the other of which will crimp the projecting edge 10 of theouter rin down onto the head, as illustrated in Fig. The glue or sizingat this portion of the outer ring facilitates the crimping operation asit seems to soften the material at this point and enables it to take thecrimp without cracking and provide a smooth head around the edge. Aswill be noted, in the present embodiment, the sizing material covers theentire inner face of the strip 4: so as to not only modify the portionto be crimped, but

' as well to secure the several plies to ether in Thereupon, having setthe head in place, as

for instance the head 11, illustrated in Fig. 6, the crimping iseffected throu h the instrumentality of a heated die which pressesagainst the projecting edge of the outer ring nausea and not only crimpsthe same butsoftens the sizing or glue so as to enable smooth crimp" ingto be effected, whereupon subsequent drying or cooling and setting ofthe glue tends to firmly retain the turned edge incrimped condition.

It is to be understood that any suitable materials maybe employed whichare adapted for the-purpose. In the present embodiment the inner narrowstrip 1 may be of a relatively cheap short fibre paper, as card middlestrip, but preferably will have one finished face which will become theinner face of the ring and form a finished inner face of the box part.should preferably be made of a tough fibrous grade of paper, such ascraft paper, which has along fibre, and which is not apt to crack underthe strains of crimping. The outer face of the outer ring formed fromthe strip 4: may be covered with a thin fancy aper to give a desiredexterior finish to the ox. Various styles of paper may be ap plied tothe outer face to accord with the finish desired. In the presentembodiment the box is circular in plan and the rings referred to areconsequently circular to com port therewith. It is to be understood,however, that boxes of other shapes may be made by the process. Inmaking the rings it is preferred to employ strips 1 and 4 and toassociate them in such manner, in ring form. It is preferred that thegrain of one strip run crosswise to that of the other in the assembledrings, whereby a stiffer and more durable box part is formed than wouldbe the. case were the grains of both materials parallel. Accordingly, astrip 1 may be formed or selected in which the grain runs lon itudinallyof the strip, and a strip 4 ma e or chosen in which the grain runscrosswise thereof, with the result that, in the assembled ringstructure, the predetermined shape will be maintained. The sizingemployed for the outer strip is preferably animal glue, and the strip iscoated to its edge with this glue, so that this glue lies between theplies of the ring made of the strip 4, especially between the plies ofthe portion 10 which is to be crimped. After the crimping this gluehardens or sets and tends to preserve the crimp and prevent thelaminations from unrolling at the crimped edge.

In Fig. 8 a section of a completed box is illustrated, in which thebase, or bottom, 13 and the cover, or top, 14 are each formed inaccordance with the process above explained. In lieu of a single head11, the cover is provided with an additional domed head 15, which liesat its margin on the head 11 and is retained by the crimped artl2. Inthis particular embodiment the ox has an inner neck 16, secured to thebase and projecting across the plane of meeting 17 of the flanges of thebase and cover. The numeral 18 indi- The outer ring at cates apunc'turable head material in the box.

In View of the above are accomplished, among others, the objectshereinbefore referred to. Y I

As many-changes-could be made in the above construction and manyapparently widely different embodiments of this invention could be madewithout departing from the scope thereof, it is intended that. all

which stirs the matter contained in the above description claim as newand desire to secure by Letters Patent, is

1. A method of the character described including coiling a sized stripinto a multiple-ply ring while the sizing is moist so as to cause theplies to adhere, allowing the size to dry, softening a multiple-plysized edge of the ring, and crimping said edge.

2. The method of making a box which includes coiling a paper strip ofpredetermined width into a ring, coiling on said ring a. second paperstrip into a second multiple-ply ring with one multiple-ply edge thereofrojectin above the proximate edge of the lrst rnentwned ring, theportion of the strip which forms the projecting portion of said secondring having a coat of moist sizing during coiling thereof.

3. The method of making a box which in eludes coiiing a paper strip ofpredetermined width into airing, coiling on said ring a second paperstrip into a second multipleplyring with one multiple-ply edge thereofprojecting above the roximate edge of the first'finentioned ring, t eportion of the stri which forms the projecting portion of sai secondring having a coat of moist sizing during coiling thereof, and crimpingsaid sized projecting portion in the presence of heat after permittingit to dry.

4;. The method of making a box which in eludes coiling a per strip ofpredetermined width glue on its outer face into a multiple-ply r1ng,coiling on said ring a secsaid projecting portion of said second ring aand crimping the projecting portion onto said head in the presence ofheat.

5. The method of making a box which includes coiling a short-fibre paperstrip in which the grain runs longitudinally into ring, coiling on saidring a long-fibre second paper strip in which the grain runs crosswiseinto a second multiple-ply ring with one multiple-ply edge thereof proecting above the proximate edge of the first mentioned ring, the portionof the strin which forms the projecting portion of said second ringhaving a coat of moist sizing during coilin thereof.

6'. method of the character described including providing a paper ringhaving dry sizing at one end, softening said sizing and crimping saidsized end while the sizing is soft.

7. A method of the character described including providing a.multiple-ply paper ringhaving dry sizing at one end between plies,softening said sizing and crimping said sized and while the sizing issoft.

8. A method of the character described including providing a paper ringhaving dry sizing at one end, softening said sizing by heat and crimpingsaid sized end while the sizing is soft.

9. A method of the character described including providing amultiple-ply paper ring having dry sizing at one end between plies,softening said sizing by heat and crifimping said sized end while thesizing is so t.

In testimony whereof I aflix my signature, in the presence of twowitnesses.

LYNDON C. PALMER.

Witnesses:

E. L. Bnronnrrarr, A. Q.

